EP3824763B1 - Drive device for a mobile furniture item - Google Patents

Description

A first aspect - not according to the invention - relates to a drive device for a movable furniture part, in particular for a drawer, with a carrier, an ejection device movable relative to the carrier for ejecting the movable furniture part from a closed position into an open position, a locking device for locking the ejection device in a locking position, a triggering mechanism for moving the locking device from the locking position into an unlocking position, wherein the triggering mechanism can be activated by pushing the movable furniture part into a pushing-over position behind the closed position and when the unlocking position is reached the movable furniture part can be moved by the ejection device in the opening direction, and one from the movable furniture part separate transmission device for transmitting the position of the movable furniture part to the trigger mechanism, through the transmission device a movement can be transferred from the movable furniture part to the triggering mechanism. In addition, the invention relates to an arrangement with such a drive device and a front buffer and an arrangement with two such drive devices and a synchronization device. In addition, the invention relates to a piece of furniture with such a drive device.

In the furniture fittings industry, there have been various types of drive devices for many years in order to support movements of movable furniture parts, which previously had to be carried out purely by the manual force of a user, with mechanical devices. A now widespread type of such drive devices are so-called touch-latch mechanisms, in which an ejection mechanism is set in motion by pressing on the movable furniture part in the closed position, as a result of which the movable furniture part is moved is expelled. This is particularly helpful with heavy drawers, but is also used for furniture doors or furniture flaps that are usually easier to move.

An example of such a drive device, which is used in a furniture door, comes from the generic AT 502 940 B1 out. In this lockable drive device, an ejection element and a triggering element for unlocking the drive device are provided, with the triggering element here being able to be actuated directly by means of the movable furniture part. The trigger element is part of a trigger mechanism. When the drive device is locked, the triggering element can be moved in the direction of the furniture part that is in the closed position. As a result, a distance between the triggering element and the movable furniture part is overcome, as a result of which the triggering element can be placed against the movable furniture part without play in the closed position. This always guarantees that, regardless of the exact position of the furniture door relative to the drive device in the closed position, direct triggering by overpressing is always possible. However, this document forms a non-generic state of the art, since there is no transmission device separate from the furniture part for transmitting the position of the movable furniture part to the release element of the release mechanism. The main disadvantage here is that such a drive device can only be used with furniture doors, since the drive device is usually arranged in the area of the hinges and thus directly adjacent to the movable furniture parts in such furniture with furniture doors. The disadvantage is that such drive devices are not suitable for being used in drawers, among other things. Above all, there is not enough space for such mechanisms in the cramped installation conditions of drawers. Another disadvantage here is that the same closed position of the furniture door relative to the furniture body cannot always be guaranteed. It is therefore possible that several are on top of each other or pieces of furniture arranged next to each other result in different closed positions, giving an inconsistent picture. Another generic drive device is, for example WO 2013/096981 A1 and the WO 2017/004638 A1 known.

A generic state of the art, however, is from EP 2 983 554 B1 out. Here, on the one hand, an ejection device and, on the other hand, a retraction device are provided. In addition, there is a coupling device for coupling the drive device to the movable furniture part or to the furniture body. This coupling device corresponds to the transmission device in the present application.

A similar drive device is also from the WO 2015/051386 A2 out. This document is about the fact that the overpressing movement starts free of a movement transmission between the first drive device and the synchronization device. In addition, the configuration of the locking recess in this document is different from the aforementioned document, since the locking recess is divided in two here and part of it—in particular the locking element—can be moved away. Thus, the locking element does not always have to be released from the locking recess by overpressing, but part of the locking recess (the locking element) can also be released or unlocked in this case by the opposite drive device and a movement transmission to the synchronization device. As a result, the latching element moves out of the latching trough directly into the ejection section.

A depth adjustment wheel is provided for each of the two latter documents. The position of the locking recess can be changed with this depth adjustment wheel. This setting serves to ensure that when the drive device is in the locked position, the movable furniture part assumes a position desired by the user relative to the furniture body. This enables a uniform aperture image to be obtained. In addition, it can be adjusted that there is always a sufficient overpressure stroke is given between the front panel of the movable furniture part and the furniture body. In the furniture fittings industry, an overpressure stroke or screen gap of approx. 2.5 mm has prevailed.

It is the case that due to tolerances between the entire components of the drive device and due to drive devices not being installed exactly on the piece of furniture, there can be relatively large differences between individual movable furniture parts built into a piece of furniture in the form of drawers. In extreme cases, there can be differences of up to 5 mm. So if the position of various drawers differs from one another by up to 5 mm in the closed position, this is not desirable for aesthetic reasons on the one hand and on the other hand it can even happen that unlocking can no longer be guaranteed if the overpressure stroke is too small. That is why these depth adjustment wheels are provided in the latter two documents in order to create a correspondingly uniform front panel image during or after installation of the drive devices together with movable furniture parts and to set a sufficiently large overpressure stroke for each drawer.

However, there are several disadvantages with these depth adjustment wheels. Firstly, additional components must be provided in the drive device. Second, the adjustments must be made each time a moveable piece of furniture is installed. Thirdly, due to the tolerances and the frequent movements, the position of the depth adjustment wheel or other parts can change over time, which can make the aperture image less precise or, in extreme cases, even make the aperture gap so small that reliable triggering can no longer be guaranteed.

The object of the first aspect of the present invention—not according to the invention—is therefore to create a drive device that is improved over the prior art. In particular, on a Depth adjustment wheel can be dispensed with. Nevertheless, it should be guaranteed that there is always a sufficient release stroke. In addition, it should be made possible that a uniform aperture image can be achieved relatively easily.

According to this, a coupling device acting or arranged between the transmission device and the triggering mechanism is provided, with the coupling device being movable from a decoupling position into a coupling position when the ejection device is in the locking position, and with the transmission device being movably coupled to the triggering mechanism by the coupling device in the coupling position. In other words, the uncoupling position is still given when the locking position is reached. Only then is the coupling device moved from this uncoupled position into a coupled position. The power transmission path between the transmission device connected to the movable furniture part and the triggering mechanism is closed by a movement in the drive device that is triggered at the latest in the closed position of the movable furniture part. Thus, in the coupled position, a transmission of movement between the transmission device and the triggering mechanism is established or guaranteed. To put it another way, the movement of the coupling device from the uncoupled position into a coupled position overcomes a distance between the transmission device and the triggering mechanism. This distance can be between 0 mm and 5 mm, which roughly corresponds to the overall tolerance and the desires of the furniture industry. Only after the locking position has been assumed and the furniture part is in its closed position is this distance then closed by the coupling device, no matter how small or large it is. As a result, the system (the drive device) resets itself every time it is locked. Said distance is therefore not closed directly between the movable furniture part and a corresponding stop of the drive device, but is closed in the drive device itself when the closed position is reached or shortly after it is reached.

According to one exemplary embodiment, it is provided that the coupling device has a first coupling element and a second coupling element, with the two coupling elements being movable relative to one another. In principle, it is possible that the movement of the coupling elements relative to one another is triggered by gravity. However, it is preferably provided that the coupling device has an engagement energy store. One of the two coupling elements is subjected to force by means of this engagement energy store. In particular, the second coupling element can be moved in the direction of the first coupling element by means of the engagement force accumulator. It is preferably provided that the two coupling elements are spaced apart from one another in the uncoupled position and are in direct contact with one another in the coupled position. The distance between the two coupling elements can be between 0 mm and 5 mm in the uncoupled position. When these two coupling elements come into direct contact, the movement coupling between the transmission device and the triggering mechanism is guaranteed.

It is actually possible for the coupling device to be moved from the uncoupled position into the coupled position immediately after the locking device has reached the locking position. As a result, an immediate triggering of the triggering mechanism and thus an ejection of the movable furniture part would be possible. However, this is disadvantageous if a user pushes through the furniture part directly when closing it, since this results in an immediate opening. In order to avoid this, a delay device is therefore provided for delaying or braking the movement of the clutch. This delay device can be designed as a damping device, by means of which the coupling elements can be moved relative to one another in a braked manner from the uncoupled position into the coupled position. That is, the force of the damping device counteracts the force of the clutch-engagement energy accumulator. The damping device can also be referred to as a timer. The time delay can be between 0.3 seconds and 5 seconds, for example. That is, if a user when closing the furniture part, the movable furniture part is completely pushed through directly beyond the closed position, there is still no movement coupling due to the uncoupled position. Thus, the locking device cannot (yet) be unlocked. For details on the function of such a "push-through protection" can be found on the WO 2014/165877 A1 to get expelled.

The carrier can be designed in the form of a plate to be mounted on the furniture part or on the furniture body. Provision is preferably made for the carrier to be in the form of a housing which can preferably be attached or is attached to the movable furniture part. This housing is preferably formed in two parts, with a housing base plate and a housing cover are provided, which are connected to each other by z. B. snap connections or the like can be connected. The housing is preferably made of injection molded plastic.

According to the invention, the ejection device has an ejection slide that can be moved relative to the carrier and an ejection force storage device, preferably in the form of a tension spring, with the ejection force storage device being fastened to the carrier with a first energy storage base and to the ejection slide with a second energy storage base. In principle, the ejection carriage can also be designed in the form of a pivotable lever.

According to the invention, however, it is provided that the ejection carriage can be moved linearly in an ejection path correspondingly formed in the carrier or in the housing. The ejection force accumulator can be designed magnetically. The ejection force accumulator is preferably designed as a spring, in particular as a tension spring. This ejection energy accumulator can also be in the form of a spring assembly. Furthermore, it is provided according to the invention that the ejection carriage has a carriage base and a control lever pivotably mounted on the carriage base.

In the case of the transmission device, it is preferably provided that it has a transmission element that can be moved relative to the carrier and a stop, preferably formed on the transmission element, for a driver, preferably arranged on a furniture body. The transmission element is movably mounted in a transmission element track formed in the carrier. In addition, it is preferably provided that the transmission device has a catch lever, which is mounted on the transmission element so that it can move, preferably pivot, for a driver that is preferably arranged on a furniture body. As a result, both a movement in the opening direction and a movement in the closing direction can be passed on from the movable furniture part to the transmission element or vice versa. This catch lever is preferably also movably mounted in the transmission element path, this path having an angled end section in order to pivot the catch lever to the rest of the transmission element and thereby enable the driver to be released from the transmission device. In principle, it is possible for the ejection device to contact the movable furniture part or the furniture body directly during ejection. However, it is preferably provided that the transmission device, preferably its transmission element, can be contacted during ejection by the ejection device, preferably by its control lever, and can be moved relative to the carrier.

In order to enable the ejection device to be locked and unlocked in a simple manner, the invention provides that the locking device has a locking pin arranged on its control lever and a guideway for the locking pin, preferably at least partially formed in the carrier, with the locking pin in the Locked position is locked in a detent recess of the guideway. It is It is possible that this detent recess is part of a locking path that is generally heart-shaped, in which the locking pin is moved out of the detent recess by overpressing and reaches the ejection section via a deflection slope. However, it is preferably provided that the latching depression is at least partially formed by a locking element that can be moved relative to the carrier, the locking pin being held on the locking element in the locking position. Unlocking is not triggered directly by a relative movement of the locking pin to the detent, but the locking element - which also forms the detent - is moved away so that the locking pin is no longer held in the detent, but is moved relative to the carrier by the force of the ejection force storage device becomes.

Furthermore, it is preferably provided that the triggering mechanism has at least one triggering element that is movably mounted on the carrier and a triggering lever that is movably, preferably pivotably, mounted on the carrier and is preferably formed separately from the triggering element. In the three different embodiment variants of the present invention described in detail later, the release lever is formed separately from the release element in the first and third variant, whereas in the second variant the release element and the release lever are formed as one component.

The release element is that part of the release mechanism which ultimately causes unlocking. This means that this triggering element is arranged closest to the locking device or even forms part of it. It is preferably provided here that the locking element is connected to the triggering element, preferably formed in one piece with the triggering element.

It can be provided for the coupling device that the two coupling elements are completely independent components. Preferred is for easy manufacture and intended to avoid too many parts that the coupling elements are partly co-formed by other devices. Accordingly, it is preferably provided that the first coupling element is connected to the transmission element of the transmission device or is designed in one piece with it. In addition, it is preferably provided that the second coupling element is connected to the release lever of the release mechanism or is formed in one piece with it. The release lever is therefore that part of the release mechanism which is closest to the transmission device.

It can preferably be provided that the drive device also has a, preferably damped, retraction device for retracting the movable furniture part from an open position into the closed position.

As already mentioned, there are three specific embodiments, specifically for the release mechanism and for the coupling device.

In the first variant, it is therefore provided that the first coupling element is designed as a stop surface on the transmission element and the second coupling element is designed as a compensating wedge. This compensating wedge is designed in such a way that during the movement from the uncoupled position to the coupled position it moves into the distance between the transmission device and the triggering mechanism and is moved in until the movement coupling and thus the coupled position is given. The exact design of a compensating wedge is arbitrary, as long as there is a taper and a corresponding mobility is available. Provision is preferably made for the compensating wedge to have a curved surface, with the curved surface making contact with the stop surface on the transmission element in the coupled position. The advantage of such a compensating wedge is that there is continuous adjustment or continuous compensation of the distance between the transmission device and the triggering mechanism.

In the second and third variants, there is a different type of coupling. Here it is provided that the first coupling element is designed in the form of latching depressions formed on the transmission element and the second coupling element has at least one latching tooth which can be latched in one of the latching depressions. Thus, depending on the position of the transmission device relative to the carrier, the latching tooth can latch in different latching indentations. For manufacturing reasons, it is preferably provided that the snap-in recesses have a distance of about 0.7 mm from one another.

In the third variant, only a single latching tooth is provided, whereas in the second variant it is provided that the first coupling element is designed as a crown wheel that can be rotated about an axis of rotation, with a large number of radially aligned latching depressions being formed around the axis of rotation, and that the second coupling element is designed as a crown wheel that can be rotated about an axis of rotation, preferably about the same axis of rotation, with a large number of snap-in teeth, each radially aligned and corresponding to the latching depressions, being formed around the axis of rotation, wherein in the coupled position, when the crown wheels rotate relative to one another in at least a direction of rotation the latching teeth rest against the latching depressions. For the relative movement of the crown wheels to one another between the uncoupled position and the coupled position, it is preferably provided that the two crown wheels can be moved relative to one another along the axis of rotation. That is, if the face gears are spaced apart along the axis of rotation, no coupling is possible. However, as soon as the crown gears are no longer spaced apart, there is a coupling at least in one direction of rotation.

An arrangement with a drive device and a front buffer for fixing the closed position of the movable furniture part relative to the furniture body is also described. This front buffer can be attached to the furniture body.

In the case of smaller drawers in particular, it is sufficient if only a single drive device is provided. With larger drawers or with heavily loaded drawers, it is advantageous if two drive devices arranged on opposite sides and one synchronization device are provided. For this reason, protection is also sought for an arrangement with two drive devices according to the invention and a synchronizing device, the drive devices—in particular the movements of the triggering elements—being coupled in terms of movement via the synchronizing device. The two drive devices are preferably of mirror-symmetrical design.

Also described is a piece of furniture with a furniture body, a furniture part that can be moved relative to the furniture body, and at least one drive device according to the invention. This movable furniture part can be designed in the form of a drawer, a furniture door or a furniture flap.

It is possible that the drive device is mounted on the furniture body and acts on a driver arranged on the movable furniture part or directly on the movable furniture part. However, it is preferably provided that the drive device is mounted on the movable furniture part and at least one driver that corresponds to the drive device is attached to the furniture body. Consequently, the drive device, together with the movable furniture part, pushes itself off directly on the furniture body or on a driver that is fixed to the furniture body.

In order to guarantee a uniform front panel image, it is preferably provided that a preferably elastic front buffer is arranged on a front side of the furniture body, with the movable furniture part, preferably a front panel of the movable furniture part, resting against the front buffer in the closed position, with the movable furniture part being pressed over can be pressed in the closing direction of the front buffer by the movable furniture part. If on one An identical front buffer is assigned to the furniture body for each movable furniture part, so each movable furniture part (drawer) can assume exactly the same position relative to the furniture body. This inevitably results in a constant aperture image. In addition, the front buffers guarantee that there is always a sufficient release stroke or overpressure stroke, since these front buffers can be pressed in by manual pressure on the movable furniture part and the overpressing movement and unlocking takes place as a result. It is preferably provided that the front buffer in the unloaded state projects between 1.5 mm and 3.5 mm, preferably between 2.3 mm and 2.7 mm, from the furniture body in the direction of the movable furniture part. In particular, the front buffer, preferably its plunger, protrudes by 2.5 mm from the furniture body. After the movable furniture part has been pushed in and ejected, the front buffer protrudes again by 2.5 mm due to its elasticity or due to the spring force.

A second - according to the invention - aspect of the invention relates to a drive device for a movable furniture part, in particular for a drawer, with a carrier, an ejection device that can be moved relative to the carrier for ejecting the movable furniture part from a closed position into an open position, the ejection device being activated by an overpressing movement of the movable furniture part can be unlocked from a locking position into a push-over position located behind the closed position, and a locking device for locking the ejection device in the locking position, the locking device having a locking pin arranged on the ejection device and a guideway, in particular at least partially formed in or on the carrier, for the Has locking pin, wherein the locking pin is locked in the locking position in a locking trough of the guide track, wherein the locking trough at least partially from a is formed relative to the carrier movable locking element and wherein the Locking pin is held in the locking position on the locking element.

Such a drive device is from WO 2015/051386 A2 known. Specifically, in this known drive device, the locking element is rotatably mounted on the housing. The disadvantage here is the relatively large amount of space required, since during the rotary movement the coupling element connected to the locking element protrudes relatively far to the side.

Also at the JP 2007-009507 A the locking element that forms the locking recess is only rotatably or pivotably mounted.

On the other hand, at DE 20 2009 005 256 U1 according to the in the 11 and 12 embodiment shown, a component that forms the locking recess can be moved linearly. However, this linear movement of the component referred to as a guide element only takes place when it is opened by pulling on the movable furniture part. In particular, this movement of the guide element takes place in the direction in which the end section (locking pin) also moves during the overpressing movement. In the event of an overpressing movement and subsequent ejection movement, there is no relative movement between the two components that form the locking recess, since the end section (locking pin) simply moves along the loop-shaped section (heart-shaped guideway). Consequently, although a linear movement of the guide element is shown in this document, this movement does not take place when unlocking and opening by means of an overpressing movement.

The object of this second aspect of the present invention—according to the invention—is to provide a drive device that is an alternative to the prior art. In particular, the disadvantages mentioned are to be eliminated.

This is solved by a drive device with the features of claim 1. Accordingly, it is provided that the locking element is mounted on the carrier in a linearly movable manner, wherein the locking element is linearly movable, starting from its position in a given locking position, counter to the direction in which the locking pin moves during the overpressing movement. A drive device is thus created in which a space-saving movement of the locking element is provided when opening by overpressing.

Preferred embodiments of this second aspect of the invention are set out in the dependent claims.

According to a preferred exemplary embodiment, it is provided that the guideway is designed in the shape of a heart curve.

In order to enable transmission of the unlocking movement to a second drive device arranged on the opposite side of the furniture part, it is preferably provided that the locking element is connected to a synchronizing element for synchronizing the movement of the locking element with a locking element of a second locking device. It is particularly preferred for this purpose that the locking element is designed in one piece with the synchronization element.

The synchronizing element can be designed, for example, in the form of a transmission lever. However, it is preferably provided that the synchronization element is designed as a toothed rack.

According to a preferred embodiment it is provided that the locking element on or in the carrier, preferably in a recess of a Housing base plate of the carrier, mounted so that it can move to a limited extent and is guided in a linearly displaceable manner. Guide elements that correspond to one another can particularly preferably also be formed on the locking element and in the carrier.

Furthermore, it can be provided that the locking element can be moved linearly, starting from its position in the given locking position, in the direction of an ejection section of the guide track.

According to the invention, the locking element is subjected to a force by an energy accumulator, preferably by a spring.

According to the invention, it is provided that after unlocking (and during a relative movement of the locking pin in the ejection direction), the locking pin comes into contact with the locking element and the locking element can be moved by the locking pin against the force of the energy accumulator in the direction of the ejection section of the guide track.

It is preferably provided that—as soon as the locking pin disengages from the locking element—the locking element can be moved by the force accumulator in that direction in which the locking pin moves during the overpressing movement. The locking element is thus already moved back again during ejection, so that the locking element again forms the latching recess together with the guideway.

Furthermore, it is preferably provided that a gap between the locking element and a limit stop of the guideway is released by the locking pin moving the locking element. In addition, it is preferably provided that the The locking pin can be moved further through the gap into the ejection section of the guide track and the locking pin disengages from the locking element.

In a specific exemplary embodiment, it is provided that the locking pin is deflected into the gap by a surface formed on the locking element, which is aligned obliquely to the linear movement direction of the locking element, and the locking pin is released from this surface.

Protection is also sought for an arrangement with two drive devices according to the second aspect of the invention and a synchronizing device for synchronizing the locking elements of the two drive devices.

According to a preferred exemplary embodiment of the arrangement, it is provided that the overpressing movement begins without any transfer of movement between the first drive device and the synchronizing device, and the synchronizing device can be moved by the first drive device when the movable furniture part moves in the opening direction. In particular, it can also be provided that movement is only transmitted from the first drive device to the synchronization device after unlocking.

Furthermore, it is preferably provided that the synchronizing device has synchronizing elements arranged on the drive devices, which are preferably designed as toothed racks.

Particularly preferably, it can be provided that the synchronization device has a preferably rotatable synchronization rod, with both ends of the Synchronization rod synchronization counter-elements, preferably gears, are arranged.

The dependent claims and preferred exemplary embodiments of the second aspect of the invention also apply to the first aspect of the invention, insofar as this is technically possible and sensible. The same applies vice versa.

Fig. 1

perspektivisch ein Möbel mit zwei Schubladen,

Fig. 2

in einer Seitenansicht den Frontpuffer in nicht eingedrücktem Zustand zur Definition der Schließstellung,

Fig. 3

in einer Seitenansicht den eingedrückten Frontpuffer beim Überdrücken,

Fig. 4

eine Draufsicht auf das Möbel mit zwei gegenüberliegenden Antriebsvorrichtungen samt Synchronisierungsvorrichtung und Ausziehführung,

Fig. 5 & 6

Explosionsdarstellungen einer ersten Ausführungsvariante der Antriebsvorrichtung,

Fig. 7 - 17

Draufsichten auf die Antriebsvorrichtung gemäß der ersten Ausführungsvariante in verschiedenen Stellungen während der Bewegung des bewegbaren Möbelteils,

Fig. 18 - 20

Draufsichten auf verschiedene (Extrem-)Stellungen der Kuppelvorrichtung gemäß der ersten Ausführungsvariante,

Fig. 21

Details zur Führungsbahn,

Fig. 22

Details zur Verriegelung und zur Synchronisierung,

Fig. 23 & 24

Explosionsdarstellungen einer zweiten Ausführungsvariante der Antriebsvorrichtung,

Fig. 24a

perspektivisch die Details zweier Kronenräder,

Fig. 25 - 32

Draufsichten auf die Antriebsvorrichtung gemäß der zweiten Ausführungsvariante in verschiedenen Stellungen während der Bewegung des bewegbaren Möbelteils,

Fig. 33 - 35

Draufsichten auf verschiedene (Extrem-)Stellungen der Kuppelvorrichtung gemäß der zweiten Ausführungsvariante,

Fig. 36 & 37

Explosionsdarstellungen einer dritten Ausführungsvariante der Antriebsvorrichtung,

Fig. 38 - 47

Draufsichten auf die Antriebsvorrichtung gemäß der dritten Ausführungsvariante in verschiedenen Stellungen während der Bewegung des bewegbaren Möbelteils,

Fig. 48 - 50

Draufsichten auf verschiedene (Extrem-)Stellungen der Kuppelvorrichtung gemäß der dritten Ausführungsvariante

Fig. 51 - 55

Draufsichten auf ein viertes Ausführungsbeispiel einer Antriebsvorrichtung in verschiedenen Stellungen und

Fig. 56 - 62

Draufsichten auf eine Anordnung aus zwei Antriebsvorrichtungen gemäß dem vierten Ausführungsbeispiel und einer Synchronisierungsvorrichtung in verschiedenen Stellungen.

Further details and advantages of the present invention are explained in more detail below on the basis of the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show in it:

1

in perspective a piece of furniture with two drawers,

2

in a side view the front buffer in the non-pressed state to define the closed position,

3

in a side view the pressed in front buffer when overpressing,

4

a top view of the piece of furniture with two opposing drive devices including a synchronization device and pull-out guide,

Figures 5 & 6

Exploded views of a first embodiment of the drive device,

Figures 7 - 17

Top views of the drive device according to the first embodiment variant in different positions during the movement of the movable furniture part,

Figures 18 - 20

Top views of different (extreme) positions of the coupling device according to the first embodiment,

21

details of the guideway,

22

Locking and synchronization details,

Figures 23 & 24

Exploded views of a second embodiment of the drive device,

24a

in perspective the details of two crown gears,

Figures 25 - 32

Top views of the drive device according to the second embodiment variant in different positions during the movement of the movable furniture part,

33 - 35

Top views of different (extreme) positions of the coupling device according to the second embodiment variant,

Figures 36 & 37

Exploded views of a third embodiment of the drive device,

38 - 47

Top views of the drive device according to the third embodiment variant in different positions during the movement of the movable furniture part,

48 - 50

Top views of different (extreme) positions of the coupling device according to the third embodiment

Figures 51 - 55

Top views of a fourth embodiment of a drive device in different positions and

56 - 62

Top views of an arrangement of two drive devices according to the fourth embodiment and a synchronizing device in different positions.

1 shows a piece of furniture 100 in a perspective representation. This piece of furniture 100 is composed of the furniture body 10 and the movable furniture parts 2 arranged one above the other in this case. These two movable furniture parts 2 are designed as drawers. The drawer is composed of at least the drawer container 15 and the front panel 14 . The upper drawer is in an open position OS, while the lower drawer is in the closed position SS. The movable furniture parts 2 are each movably mounted via pull-out guides 16 which are arranged on opposite sides of the furniture carcass 10 and can only be seen here in part. A drive device 1 for the movable furniture part 2 can also be seen to some extent. A front buffer 13 is attached to the front of the furniture carcass 10 at least on one side. This front buffer 13 has a thickness of approx. 2.5 mm and defines the front panel gap between the front panel 14 and the furniture body 10 in the closed position SS.

In 2 the front buffer 13 attached to the furniture carcass 10 can be seen in matching detail. The front buffer 13 has a buffer sleeve 130 fastened in the furniture body 10, a buffer force accumulator 131 (preferably in the form of a compression spring) and a plunger 132 acted upon by the buffer force accumulator 131. The front panel 14 rests on this front buffer 13 . This 2 thus shows the closed position SS of the movable furniture part 2. The distance between the furniture body 10 and the front panel 14 is 2.5 mm here.

In contrast, in 3 the override position ÜS shown. That is, starting from the closed position SS, a user has pressed on the movable furniture part 2 (in particular on its front panel 14) in the closing direction SR. As a result, the flexible front buffer 13--in particular its buffer force accumulator 131--is compressed. As a result, the front panel gap is less than 2.5 mm. For example, an overpressure movement of approx. 0.3 mm to 0.5 mm is sufficient to unlock the locking device 5, which will be described in detail later, whereby the ejection device 4 is activated and the drive device 1 ejects the movable furniture part 2 again in the opening direction OR . The buffer force accumulator 131 of the front buffer 13 can then relax again or move back into its original shape, so that the closed position SS, as in 2 can be achieved. Alternatively, the front buffer 13 can also be made of a flexible plastic (without a compression spring).

According to the top view 4 the components of the pull-out guide 16 and the parts of the two drive devices 1 and the synchronization device 12 can be seen more clearly. Accordingly, the body rail 17 is attached to the furniture body 10, on which the drawer rail 18 is movably mounted. If necessary, an additional Central rail and/or a container rail can be provided. The body rail 17 together with the drawer rail 18 forms the pull-out guide 16. The drive device 1 is mounted on the drawer rail 18 or on an underside of the drawer container 15. Together with the synchronizing device 12 and the driving device 1 on the opposite side, a claimed arrangement is formed. The driver 11 is mounted on the body rail 17 (or directly on the furniture body 10), preferably via a corresponding mounting plate 19. In 4 the movable furniture part 2 is not shown.

In the Figures 5 to 22 a first variant embodiment of a drive device 1 is now shown.

The figure 5 and 6 each show an exploded view of the drive device 1 according to the first exemplary embodiment, once viewed from the front and once from the rear. The carrier 3 is made up of the housing base plate 30 and the housing cover 31 . The guide track 51 for the locking pin 50 formed or attached to the control lever 45 is formed in both parts of this carrier 3 . The locking pin 50 is guided in this guideway 51 . A guide track 76 (transmission element track) for the transmission element 70 and for the catch lever 72 of the transmission device 7 is also formed in both parts of the carrier 3 . This guide track 76 has an angled end section 77 , with the catch lever 72 pivoting relative to the transmission element 70 when the catch lever 72 is moved in this angled end section 77 . Between this catch lever 72 and the stop 71 facing the catch lever 72, the driver 11 fixed to the furniture carcass (not shown here) can be held. The transmission device 7 thus transmits the position of the driver 11 - which corresponds to the relative position of the furniture body 10 to the movable furniture part 2 - on the drive device 1. In both parts of the carrier 3 is also the Guide track 46 for the ejection carriage 40 of the ejection device 4 is formed.

The ejection carriage 40 of the ejection device 4 is composed of the control lever 45 and the carriage base 44 . The control lever 45 is pivoted on the carriage base 44 . In addition, an ejection force accumulator 41 is also provided, which forms the ejection device 4 together with the ejection carriage 40 . In this case, this ejection force accumulator 41 is designed in the form of two tension springs. The ejection force accumulator 41 is held at one end on the second force accumulator base 43 formed in the carriage base 44 . With the other end, the ejection force accumulator 41 is held on a first force accumulator base 42 formed in or on the carrier 3 .

A recess 54 is also formed in the housing base plate 30 . In this depression 54 in turn an elongated guide groove 55 is formed. The triggering element 60 of the triggering mechanism 6 is guided in this guide groove 55 in a linearly movable manner via the guide projections 66 . A part of the guide track 51 is formed on the triggering element 60 . In addition, the locking element 53 is formed on this triggering element 60 . The triggering element 60 is subjected to a force by the spring 67 in the form of a compression spring. This spring 67 surrounds the guide mandrel 68, this guide mandrel 68 being held on the one hand on the mandrel holder 68a formed on the carrier 3 and on the other hand on the mandrel holder 68b formed on the triggering element 60. When the spring 67 is relaxed, the release element 60 rests on (in the figure 5 illustrated) left edge of the recess 54 at. In this position, the locking element 53 (together with an area of the guide track 51) forms the locking recess 52 (details follow in 21 ). The locking device 5 is thus mainly formed by the locking element 53 and the locking pin 50 .

The most important components of the release mechanism 6 are on the one hand the release lever 61 and on the other hand the release element 60 already described. With these extensions 691, the first linkage part 69a is guided in a linearly movable manner in the elongate guide track 692 formed in the housing cover 31. The first linkage part 69a rests on the release lever 61 with one end. This release lever 61 is rotatably mounted on the bearing recess 903 in the compensating bracket 90 via a bearing element 611 formed thereon. The second linkage part 69b is rotatably mounted via the bearing element 693 in a corresponding depression 694 formed in the housing cover 31 . A corresponding, corresponding depression 694 is also formed in the housing base plate 30 . The elongated hole 695 is formed in the upper end of the second linkage part 69b. One of the extensions 691 of the first linkage part 69a engages in this elongated hole 695 . The third linkage part 69c has a bearing projection 687 at one end. The third linkage part 69c is held or guided in the lower elongated hole 697 of the second linkage part 69b via this bearing projection 687 . A retaining bolt 696 is arranged on the end of the third linkage part 69c facing away from the bearing projection 687 . This retaining bolt engages in a corresponding retaining bolt recess 688 in the release element 60 . Thus, the release lever 61, the release linkage 69 and the release lever 61 in particular form the release mechanism 6.

Another important component of the drive device 1 is the coupling device 8. In this first embodiment variant, the first coupling element 81 is formed in the form of a stop surface 73 formed on the transmission element 70. The corresponding, second coupling element 82 is formed by the compensating wedge 62 or by its curved surface 63 . The compensating wedge 62 is in this case equivalent to the release lever 61. The curved surface 63 corresponds to the second Coupling element 82. In the uncoupled position EK, this second coupling element 82 is at a distance from the first coupling element 81, whereas in the coupled position KS they make contact. The engagement movement of the coupling device 8 is triggered by the engagement force accumulator 83 . In particular, the second coupling element 82 is acted upon indirectly by the engagement force accumulator 83 .

Finally, the drive device 1 also has a delay device 9, by means of which the coupling elements 81 and 82 can be moved with a time delay relative to one another from the decoupling position EK into the coupling position KS. In this first embodiment variant, the delay device 9 comprises the compensating bracket 90, the gear wheel 91, the clamping disk 92, the first clamping lever 93, the second clamping lever 94 and the restoring spring 95 forming the engagement energy store 83. The bearing element 901 is arranged on the compensating bracket 90. The compensating bracket 90 is rotatably mounted in the recess 902 formed in the housing base plate 30 via this bearing element 901 . A bearing recess 903 is also formed in this compensating bracket 90 . The release lever 61 (compensating wedge 62) is rotatably mounted in this bearing recess 903 via its bearing element 611. A further bearing recess 904 is also formed in the compensating bracket 90 . The second clamping lever 94 is rotatably mounted in this bearing recess via an upper projection 941 . In addition, this second clamping lever 94 has a lower projection 942 . The second tensioning lever 94 is rotatably mounted in the corresponding recess 921 in the tensioning disk 92 with this lower projection 942 . The clamping disk 92 in turn forms a rotary damper together with the round depression 96 formed in the housing base plate 30 . The anti-rotation can develop its function in the form of corresponding grooves. The return spring 95 designed as a spiral spring is held on the one hand on the spring projection 922 of the clamping disk 92 and on the other hand on the spring projection 923 formed in the housing cover 31. The return spring 95 is generally in the im Housing cover 31 formed recess 97 housed. The return spring 95 acts on the clamping disc 92 in such a way that according to figure 5 should be rotated relative to the carrier 3 clockwise. The damping effect between the clamping disk 92 and the depression 96 counteracts this rotational movement, which is triggered by the return spring 95 and corresponds to the coupling movement of the coupling device 8 . The gear wheel 91 is rotatably mounted in the corresponding depression 912 of the carrier 3 via its central bearing element 911 . The toothed wheel 91 meshes with the teeth arranged correspondingly on the circumference of the clamping disk 92 (not shown in detail) via teeth arranged on the circumference. A retaining recess 913 is in turn formed eccentrically on the gear wheel 91 . A projection 931 of the first clamping lever 93 engages in this holding recess 913 . The projection 932 formed at the other end of the clamping lever 93 is in turn guided in the guide 98 which is formed in the housing cover 31 . A resilient element 99 in turn adjoins this guide 98 . When passing the transmission element 70, the projection 932 is pressed by this transmission element 70 against the resilient element 99 and bends it downwards.

In the following figures, the functional sequence of the closing and opening of the drive device 1 according to the first embodiment variant is described as a sequence.

In 7 is shown in a plan view of a drive device 1 according to the first embodiment in the assembled state. In the position shown, the movable furniture part 2 is in an open position OS. The movable furniture part 2 is not shown in this figure and in the following figures, but the carrier 3 of the drive device 1 is attached to the movable furniture part 2 . The relative position between the furniture part 2 and the furniture body 10 then emerges from the following figures with reference to the driver 11 fixed to the furniture body. In 7 In any case, the movable furniture part 2 is in a relatively wide open position OS. Accordingly, the locking pin 50 formed on the control lever 45 is stored at the beginning of the clamping section S in the bearing area L of the locking track 51 . The control lever 45 is pivoted about the control lever axis 47 on the carriage base 44, with 7 the control lever 45 is in the clockwise most upward pivoted position. The ejection force accumulator 41, which is held on the carriage base 44 of the ejection carriage 40 via the second force storage base 43, is in a relaxed position.

In 8 has the movable furniture part 2 opposite 7 moved in the closing direction SR. This can be seen from the fact that the driver 11 rests against the stop 71 of the transmission element 70 . Due to the relative movement between the furniture body 10 and the movable furniture part 2 in the closing direction SR, the driver 11 has moved the transmission element 70 relative to the remaining components of the drive device 1 . Specifically, the driver 11 is held between the catch lever 72 and the stop 71 of the transmission element 70 in this position. The control lever 45 - guided by the control pin 51 - is moved along the guide track 51 by the clamping stop (stop surface 73) formed on the transmission element 70, which bears against the contact element 451 of the control lever 45. The carriage base 44 also moves with this control lever 45, as a result of which the ejection force accumulator 41 attached thereto is tensioned.

According to 9 the movement of the locking pin 50 through the tightening section S is completed. The locking pin 50 has reached the pre-locking point W in the guideway 51 . The control lever 45 has also pivoted slightly downwards due to the guideway 51 , so that the contact element 451 of the control lever 45 is no longer in contact with the stop surface 73 of the transmission element 70 . That is, the entire transmission device 7 can continue relative to the closing Carrier 3 can be moved without the ejection force accumulator 41 having to be tightened further. In this position according to 9 So the ejection force accumulator 41 is fully charged. Ejection is not possible since the ejection carriage 40 is (pre-)locked via the locking pin 50 at the pre-locking point W of the guideway 51 . The transmission device 7 is in accordance with this position 9 further movable relative to the carrier 3 along the guide track 76. A pull-in device (not shown) can be used here for further movement in the closing direction. For the more precise functioning of such a retraction device, reference can be made to that already mentioned in the introduction to the description EP 2 983 554 B1 to get expelled.

In 10 the movable furniture part 2 has moved even further in the closing direction SR, preferably due to the retraction device. The damper stop 79 formed on the transmission element 70 comes into contact with the projection 932 formed on the first tensioning lever 93 of the delay device 9. As a result, the first tensioning lever 93 is displaced to the left. The smaller gear wheel 91 is rotated counterclockwise via the projection 931 of the first clamping lever 93 since the projection 931 engages in the eccentric holding recess 913 of the gear wheel 91 . This gear wheel 91 thus rotates via the bearing element 911 relative to the depression 912 formed in the housing base plate 30. Since the gear wheel 91 meshes with the clamping disk 92, the latter is rotated clockwise. In the eccentric recess 921 of this clamping disk 92, the second clamping lever 94 is rotatably mounted via the lower projection 942 and is moved with the clamping disk 92. This movement of the second clamping lever 94 also triggers a movement of the compensating bracket 90 . In particular, the upper projection 941 of the second clamping lever 94 engages in the bearing recess 904 of the compensating bracket 90 . Since the compensating bracket 90 is in turn rotatably mounted directly in the recess 902 in the carrier 3 via the bearing element 901 , the compensating bracket 90 is rotated clockwise about the bearing element 901 . The bearing element 611 of the Release lever 61 rotatably mounted. The pivoting movement of the compensating bracket 90 moves the release lever 61 in the form of the compensating wedge 62 downwards. As a result, only the relatively narrow tip of this compensating wedge 62 is located between the first linkage part 69a and the transmission element 70.

In 11 the closing movement of the movable furniture part 2 has continued further. The release lever 61 of the release mechanism 6 has been lowered even further via the transmission element 70 and the delay device 9 . The projection 932 of the first tensioning lever 93 has moved so far along the guideway 98 that the projection 932 has disengaged from the damper stop 79 . That is, the contact between the cushion stopper 79 and the projection 932 is released. Thus, no more movement is transmitted from the transmission device 7 to the deceleration device 9 . In this position, the restoring spring 95 forming the engagement energy accumulator 83 is tensioned, since one end of this restoring spring 95 is held on the spring projection 923, while the other end of the restoring spring 95 has rotated with the spring projection 922 of the tensioning disc 92. That is, the spring washer 92 is now subjected to a counterclockwise force by the return spring 95 . However, rotation is not possible since the projection 932 rests against the transmission element 70 and cannot move along the guide 98 . In addition, 11 It can also be seen that the contact element 451 of the control lever 45 is located in a control lever track 452 formed in the transmission element 70 . The contact element 451 has already reached a slightly bent end area of this control lever track 452 . In this position according to 11 but the deflection of the contact element 451 triggered by this bent section of the control lever track 452 is not quite sufficient to release the control lever 45 and its locking pin 50 from the pre-locking point W of the guide track 51 .

In 12 the movable furniture part 2 has moved even further in the closing direction SR. During this movement, the contact element 451 has moved further relative to the control lever track 452 in the transmission element 70 . Due to the curved section of the control lever track 452, the control lever 45 was also pivoted further counterclockwise about its control lever axis 47, so that the locking pin 50 was released from the pre-locking point W and the locking pin 50 is now in the latching movement range E of the guide track 51. As soon as the locking pin 50 is in this latching movement range E, the force of the ejection force store 41 again acts on the locking pin 50 in such a way that the locking pin 50 is moved in the direction of the latching recess 52 . In 12 It can also be seen that the projection 932 of the first clamping lever 93 no longer contacts the underside of the transmission element 70, but that the path into the guide 98 is free. this also removes the locking or movement inhibition of the engagement force accumulator 83 (return spring 95). That is, the return spring 95 can relax and move the tension disc 92 counterclockwise. However, this rotational movement is braked or dampened by the damping mechanism (deceleration device 9) acting between the clamping disk 92 and the depression 96.

In 13 the locking device 5 is in the locking position VS. In addition, the movable furniture part 2 is in the closed position SS. The coupling device 8 is already in the coupling position KS. The closed position SS of the movable furniture part 2 is achieved in particular in that the movable furniture part 2 (or its front panel 14) rests against the front buffer 13 of the furniture body 10. Depending on this, the transmission device 7 has a specific position relative to the carrier 3 . This relative position can fluctuate by approx. 5 mm. This fluctuation is primarily dependent on tolerances, on the play between the individual moving components and on the accuracy of the attachment of the driver 11 to the furniture body 10 or the carrier 3 to the movable furniture part 2. When this closed position SS is reached, the movement of the locking pin 50 into the detent recess 52 is completed practically at the same time. This is in 13 the locking pin 50 on the locking element 53. The locking device 5 is thus in the locking position VS. When the ejection device 4 is in the locking position VS, the coupling device 8 can be moved from the uncoupled position EK into the coupled position KS. In this case, the second coupling element 82 is formed by the compensating wedge 62 and its curved surface 63 . The first coupling element 81 of the coupling device 8 is formed by the stop surface 73 formed on the transmission element 70 . This stop surface 73 thus defines the closed position SS of the movable furniture part. Due to the movement of the compensating wedge 62 damped by the delay device 9 , this compensating wedge 62 (release lever 61 ) is brought up to the stop surface 73 . In 13 the coupling position KS can already be seen, in which the curved surface 63 contacts the stop face 73 . In this coupling position KS, the transmission device 7 is movably coupled to the release mechanism 6 by the coupling device 8 . Depending on how deep the position of the transmission element 70 relative to the carrier 3 is, the wedge-shaped release lever 61 can compensate for the corresponding distance. Due to the time delay of the delay device 9, this compensating movement takes about 1 to 10 seconds. This time delay is also sufficient to provide push-through protection. This means that if a user presses the movable furniture part 2 directly over or through it when closing it, no immediate triggering can take place, but rather it is necessary to wait until the coupling device 8 moves the triggering mechanism 6 with the transmission device 7 .

In 14 the overpressure position ÜS of the movable furniture part 2 is shown. In addition, the 14 the unlocking position ES of the locking device 5. The coupling device 8 is in the coupling position KS. Due to the movement of the movable furniture part 2 in In the closing direction SR (relative to the driver 11 to the right), the transmission element 70 of the transmission device 7 is moved almost to the end of the guide track 76 . This movement of the transmission element 70 relative to the carrier 3 causes the stop surface 73 of the transmission element 70 to move the release lever 61 of the release mechanism 6 via the coupling device 8. Since the compensating bracket 90 is fixed due to the given coupling position KS, the release lever 61 is pivoted counterclockwise about the bearing element 611 . The first linkage part 69a rests against this release lever 61, which is why this first linkage part 69a is displaced along the linear guideway 692. One of the extensions 691 of the first linkage part 69a engages in the elongated hole 695 of the second linkage part 69b. This movement of the first linkage part 69a pivots the second linkage part 69b counterclockwise about the bearing element 693 . The third linkage part 69c engages in the slot 697 of the second linkage part 69b via the bearing projection 687 . The pivoting of the second linkage part 69b thus shifts the third linkage part 69c. This third linkage part 69c is in turn connected to the retaining bolt recess 688 of the triggering element 60 via the retaining bolt 696 . The movement of the transmission element 70 thus causes the triggering element 60 to move in the depression 54 via the triggering mechanism 6 . This movement is guided by the guide projections 66 engaging in the guide 55 . The triggering element 60 is moved against the force of the spring 67 guided on the guide mandrel 68 . The locking element 53 is arranged or formed on the triggering element 60 . The movement of the triggering element 60 also moves this locking element 53 . In 14 this locking element 53 has moved so far that the locking pin 50 can no longer hold on the locking element 53 . So, so to speak, the locking surface 531 formed on the locking element 53 (see also 21 ) pulled away. The force of the ejection force accumulator 41 thus pushes the locking pin 50 into the ejection section A of the guide track 51 emotional. In this position according to 14 the locking pin 50 rests against a surface 532 of the locking element 53 which is aligned transversely to the locking surface 531 of the locking element 53 . As a result, the ejection force accumulator 41 can continue to develop its ejection force in that the locking element 53 and with it the triggering element 60 are moved to the right via this surface 532 against the force of the spring 67 in the recess 54 . The release element 60 is moved by the force of the ejection force accumulator 41 until the release element 60 rests against the end of the depression 54 . The locking element 53 was moved along to such an extent that there is or is a small gap between the locking element 53 and the limit stop 56 . Due to the inclined position of the surface 532, the locking pin 50 can then detach from this surface 532 and move further through the gap between the limit stop 56 of the guide track 51 and the locking element 53 into the ejection section A of the guide track 51. For the details see the 21 referred.

In 15 an open position OS of the movable furniture part 2 is then reached. The locking pin 50 has already moved about halfway through the ejection section A of the track 51 . The contact element 451 of the control lever 45 rests against the ejection stop 701 of the transmission element 70 . As a result, the control lever 45 of the ejection carriage 40 takes the transmission element 70 of the transmission device 7 with it and thus moves the transmission device 7 relative to the carrier 3. Since the transmission element 70 contacts the driver 11 via the stop 71, a relative movement of the movable furniture part 2 to the furniture body 10 is triggered . In concrete terms, the drive device 1 or its ejection device 4 pushes itself off the driver 11 and thereby takes the movable furniture part 2 with it in the opening direction OR. In this position according to 15 there is no longer any contact between the locking pins 50 and the locking element 53. Because of this, the spring 67 can also relax and moves the triggering element 60 until it rests against the left-hand edge of the depression 54 . As a result, the entire release linkage 69 is also moved again accordingly, so that ultimately the release lever 61 is also moved back in the direction of the transmission element 70 . The release lever 61 is again at a distance from its stop surface 73 due to the moving away of the transmission element 70, which is why the uncoupling position EK of the coupling device 8 is given. In order to prevent the projection 932 of the first tensioning lever 93 from preventing a movement of the transmission element 70 along the guideway 76 , the elastic element 99 is formed in the area of the guide 98 . When the transmission element 70 moves past the projection 932, the projection 932 resting on it and with it the first clamping lever 393 are pivoted by a corresponding deflection bevel 702. During this pivoting, the elastic element 99 is pressed downwards, as a result of which the transmission element 70 can pass the projection 932 . In 15 the delay device 9 has also moved back into its initial position, in that the restoring spring 52 has relaxed until the projection 932 rests against the end of the guide 98 .

In 16 the movable furniture part 2 was moved even further in the opening direction OR, this movement being triggered by the ejection device 4 . In this position, the ejection force accumulator 41 is relieved again. The projection 932 was moved up again by the elastic member 99 . If, starting from this position, the movable furniture part is then manually pulled further in the opening direction, the contact element 451 of the control lever 45 moves back into the control lever track 452. There is an angled section 453 at the left-hand end of this control lever track 452. As soon as the contact element 451 reaches this angled section 453 , the control lever 45 is pivoted further clockwise, so that the locking pin 50 is moved into the bearing area L of the guideway 51 . As a result, the starting position is again as per 7 reached.

17 shows again a drive device 1 in the locked position VS. The complete carrier 3 is shown here, so that the first energy storage base 42 and the angled end section 77 of the guideway 76 can also be seen. The movement of the projection 721 formed on the catch lever 72 into the angled end section 77 causes the catch lever 72 to be pivoted about the pivot bearing 722 . As a result, a driver 11 held between catch lever 72 and stop surface 73 is released.

In the Figures 18 to 20 a closed position SS of the movable furniture part 2 is shown in each case, but the relative position between the transmission device 7 and the carrier 3 is different in this closed position SS.

In 18 a minimum position for a release stroke is shown. Here only the foremost tip of the compensating wedge 62 bridges the distance between the trip linkage 69 and the stop surface 73 of the transmission element 70.

In 19 an approximately central position of the closed position SS is shown. Here, a somewhat wider area of the compensating wedge 62 already bridges the distance between the release linkage 69 and the transmission device 7.

In 20 an extreme position is shown in which the front panel gap and thus the release stroke have a maximum size. Here the widest area of the compensating wedge 62 is arranged between the release linkage 69 of the release mechanism 6 and the stop surface 73 of the transmission device 7 .

In 21 a section relating to the guide track 51 of the drive device 1 is shown. The most important components are therefore the tensioning section S, the preliminary locking point W, the subsequent latching movement area E and the ejection section A as well as the storage area L. In addition, the locking element 53 and its Locking surface 531 and surface 532 can be seen. The limit stop 56 is also shown. When the locking element 53 is moved to its maximum right position, the locking pin 50 (not shown here) can move between the surface 532 of the locking element 53 and the limit stop 56.

22 goes into another detail, which is important when a drive device 1 is synchronized with an opposite drive device 1 via a synchronization device 12 . For this purpose, a toothed rack 121 , only indicated schematically here, is arranged on the triggering element 60 . This rack 121 meshes with the gear 122, which in turn is connected to the synchronizing rod 123. This synchronization rod 123 thus forms the synchronization device 12 with the two racks 121 and gears 122 provided on the respective drive devices 1.

In the Figures 23 to 35 a second embodiment variant of the drive device 1 according to the present invention is illustrated. The show 23 and 24 again seen the drive device 1 in an exploded view from different sides. The basic structure of this drive device 1 is again the same as in the first embodiment. This applies above all to large parts of the carrier 3 in the form of the housing base plate 30 and the housing cover 31, the ejection device 4 with the essential components ejection force accumulator 41, carriage base 44 and control lever 45 and the component for coupling the drive device 1 to the driver arranged on the movable furniture part 2 . The associated guideways 51 and 46 are again designed to be practically identical in terms of construction. For this reason, reference can be made to the description of the first embodiment variant, especially with regard to the functioning of the ejection device 4 and the associated guideway 51 together with the locking device 5 .

In the 23 and 24 all components of the drive device 1 according to the second embodiment variant are now again shown in an exploded view. A fundamental difference from the first embodiment variant is that two different carriers are provided here (more on this in the later figures). This means that the components that form the transfer device 7 in the first embodiment variant are structurally exactly the same in this second embodiment variant, but do not function to transmit the drawer position when pushing over. However, these components are still important for other functions. In this case, therefore, the slide is referred to as a coupling slide 21, the lever as a coupling lever 22 and the track as a coupling track 23 with the angled end section 24. Everything together forms the coupling mechanism 20.

A release mechanism 6 is also provided in this second embodiment variant. In this case, this release mechanism 6 consists of only one component. This corresponds to the release element 60, which also takes over the function of the release lever 61 in this second embodiment variant. The locking element 53 is integrally formed on the triggering element 60 . In this second embodiment variant, the triggering element 60 is rotatably mounted in the corresponding recess 652 via the bearing element 651 . The triggering element 60 is partially designed as a crown wheel 65 . In other words, the release element 60 has radially aligned latching teeth 64 on an upper side. These latching teeth 64 of the crown wheel 65 form the second coupling element 82 of the coupling device 8.

In this second embodiment variant, the transmission device 7 is also designed as only one component. This transmission device 7 is designed as a rotatable crown wheel 75 . A transmission lever 751 is formed on this crown wheel 75 . The crown wheel 75 can be rotated via the central recess 752 on the bearing element 651 of the triggering element 60 stored. The radially oriented latching depressions 74 are formed on the crown wheel 75 on the side facing the triggering element 60 . These latching depressions 74 correspond to the latching teeth 64 of the release mechanism 6 and form the first coupling element 81.

In this second variant embodiment, a return device 25 is also provided for moving the transmission device 7 into the initial position. This restoring device 25 has a holding mandrel 251 which is held in the recess 253 in the carrier 3 via the base 252 . In addition, a compression spring 254 is provided, which surrounds the holding mandrel 251 and is guided by it. The reset sleeve 255 , which is closed on one side, is slipped over the compression spring 254 . This return sleeve 255 is guided in a linearly movable manner in the guideway 256 of the carrier 3 and cannot move further from the recess 253 than the sleeve stop 257 . In addition, a restoring elevation 258 is also formed on the housing base plate 30 . This restoring elevation 258 serves to ensure that the rotatable crown wheel 75 moves axially along the bearing element 651 relative to the triggering element 60 and its crown wheel 65 as a result of contact with the transmission lever 751 .

In this second embodiment variant, too, there is a possibility of synchronizing with a drive device 1 arranged on the opposite side. For this purpose, the toothed rack 121 of the synchronization device 12 is slidably guided in the guide track 124 . On the side facing the release element 60, this toothed rack 121 has teeth (not shown here) which mesh with teeth formed on the circumference of the release element 60 and also not shown. As a result, the rotational movement of the triggering element 60 is converted into a linear movement of the toothed rack 121 . The toothed rack 121 is subjected to a force by the tension spring 125 . The tension spring 125 is held on the toothed rack 121 on the one hand and on the carrier 3 on the other hand.

In this second embodiment variant, the delay device 9 is designed as a linear damper with a spring return in the area of rotation between the two crown wheels 65 and 75 .

In 24a the release mechanism 6 and the transmission device 7 are shown. The triggering mechanism 6 has the crown wheel 65 and the transmission device 7 has the crown wheel 75 . The locking teeth 64 are formed on the crown wheel 65 of the triggering mechanism 6 . Each detent tooth 64 has a substantially axially aligned flank and a slanted flank. The transmission device 7 and its crown wheel 75 has corresponding latching depressions 74 . In the representation according to 24a the latching recesses 74 lie snugly against the latching teeth 64. If the transmission device 7 is rotated clockwise in this position, the triggering mechanism 6 is also rotated, since the respective axially aligned flanks rest against one another. When the transmission device 7 is rotated counterclockwise, the trigger mechanism 6 is not moved. Rather, the transmission device 7 is slightly raised by the correspondingly designed inclined flanks of the latching teeth 64 and latching depressions 74 and moves according to the ratchet principle along the surface of the crown wheel 65 without transmitting a rotational movement to this crown wheel 65 and the triggering mechanism 6.

In 25 is again the same starting position of the drive device 1 as in 7 shown in the first embodiment. The movable furniture part 2 is in the open position OS. The coupling driver 26 connected to the furniture carcass 10 bears against the coupling carriage 21 of the coupling mechanism 20 . The coupling lever 22 is still in the pivoted position due to the angled end section 24 of the coupling track 23 . In this second embodiment variant, a further driver is connected to the furniture body 10 . In this case, this forms the driver 11 (which later comes into contact with the transmission device 7). This too Driver 11 is only indicated as a circle. The ejection force accumulator 41 is still relaxed. The locking pin 50 is located in the bearing area L of the guide track 51. The lever 751 of the transmission device 7 is in a practically maximally pivoted position to the right. In this position, the transfer lever 751 rests on the reset elevation 258. As a result, the crown wheel 75 is axially spaced from the crown wheel 65 . Since the crown wheel 75 forms the first coupling element 81 and the crown wheel 65 forms the second coupling element 82, the coupling device 8 is in the uncoupled position EK. Compression spring 254 is in a relatively relaxed position and presses return sleeve 255 against transmission lever 751.

In 26 the movable furniture part 2 was moved further in the closing direction SR by pressing. Since the coupling carriage 21 rests against the contact element 451 of the control lever 45, the ejection force accumulator 41 is tensioned via the control lever 45 and the carriage base 44. The coupling lever 22 has moved out of the angled end section 24 . As a result, the coupling driver 26 is now located between the coupling lever 22 and the coupling carriage 21.

In 27 the movable furniture part 2 was moved even further in the closing direction SR. The contact element 451 of the control lever 45 has meanwhile been deflected due to the track formed in the coupling carriage 21 , as a result of which the locking pin 50 is located in the pre-locking section W of the guide track 51 . The ejection force accumulator 41 is now fully tensioned. The driver 11 has already contacted the transmission lever 751 of the transmission device 7 and the transmission device 7 has already pivoted clockwise. Since the transmission device 7 is still elevated due to the returner elevation 258 , this rotational movement of the transmission device 7 is not (yet) transmitted to the release mechanism 6 . But a transmission takes place - namely the transmission of the Pivoting movement of the transmission device 7 on the reset sleeve 255. As a result, the compression spring 254 is already partially tensioned.

In 28 the movable furniture part 2 was moved so far in the closing direction SR that the contact element 451 was also released from the track of the coupling carriage 21, as a result of which the locking pin 50 is now also located in the locking recess 52 of the guide track 51. That is, the locking position VS of the locking device 5 has been reached. The locking pin 50 is in contact with the locking element 53 , which also forms the latching depression 52 , and which is designed in one piece with the triggering element 60 of the triggering mechanism 6 . Since the movable furniture part 2 now also rests snugly against the front buffer 13 (not shown here), the movable furniture part 2 is in the closed position SS. The driver 11 has further pivoted the transmission lever 751 to such an extent that the transmission lever 751 is no longer located above the restoring elevation 258 . As a result, the transmission device 7 together with the first coupling element 81 can move in the direction of the triggering mechanism 6 together with the second coupling element 82 . This movement along the axis formed by the bearing element 651 is braked or dampened by the deceleration device 9, which is only indicated here. This muted movement can last several seconds. The deceleration device 9 thus provides push-through protection. That is, if an operator pushes the movable furniture part 2 directly through instead of leaving it in the closed position SS, unlocking is not carried out immediately, but only after a certain time defined by the delay device 9 has elapsed. However, as soon as this time has expired or the corresponding distance has been covered, the coupling position KS is reached.

In 29 the overpressure position ÜS of the movable furniture part 2 is shown. If the movable furniture part 2 is pressed in the closing direction SR when the coupling position KS has been reached beforehand, the transmission device 7 is moved even further in via the driver 11 via the transmission lever 751 rotated clockwise. Since the coupling position KS of the coupling device 8 is given, the release mechanism 6 is also rotated clockwise. As a result, the locking lever 53 also pivots and moves away from the locking pin 50. The locking pin 50 is thus no longer held by the locking element 53. The ejection force accumulator 41 can develop its force and moves the locking pin 50 into the ejection section A. Due to the rotation of the triggering mechanism 6, the toothed rack 121 has also moved linearly via the teeth (not shown). This linear movement can be transmitted via a synchronization device 12 (not shown) to an opposite drive device 1, which is preferably of mirror-symmetrical design. The tension spring 125 is stretched here.

In 30 the open position OS is reached. Namely, if a user in the overpressure position according to ÜS 29 If the movable furniture part 2 is released, the ejection force accumulator 41 can deploy its power and move the coupling slide 21 via the control lever 45 and its contact element 451. Since this coupling slide 21 rests on the furniture carcass-fixed coupling driver 26, the drive device 1, so to speak, pushes itself from this coupling driver 26 in the opening direction OR off. The triggering element 60 was rotated further clockwise via the locking pin 50 moving through the ejection section A, as a result of which the toothed rack 121 and also the reset sleeve have reached the far left position. As soon as the contact between the locking pin 50 and the locking element 53 is removed, the tension spring 125 and the compression spring 254 can relax.

This will - as in 31 shown - the transmission lever 751 is moved counterclockwise again via the compression spring 254 and the return sleeve 255 of the return device 25 . In this case, however, the triggering element 60 is not taken along. Due to the relaxation of the tension spring 125, this triggering element 60 moves back into its initial position. The Restoring movement of the restoring device 25 can also be used to load the deceleration device 9 .

In 32 the restoring device 25 has pivoted the transmission lever 751 all the way to the right again. As a result, the transmission device 7 has been lifted again from the return elevation 258 . The two coupling elements 81 and 82 are thus again spaced apart from one another. In 32 the ejection force accumulator 41 is also relaxed again.

By further manually pulling the movable furniture part 2 in the opening direction OR, the contact element 451 is pivoted further clockwise again by the path formed in the coupling carriage 21, so that the locking pin 50 finally returns to the starting position in the bearing section L according to 26 reached.

In the Figure 33 , 34 and 35 a closed position SS is shown in each case, the relative position between driver 11 and carrier 3 being different in each case.

In Figure 33 there is therefore a minimum position. That is, the transfer lever 751 has just moved so far that it can no longer be lifted by the reset lever 258 .

In 34 an approximately middle position is given.

In Figure 35 the other extreme position is shown. This covers a tolerance range of approximately 5 mm between the two extreme positions of the closed position SS.

In general, it should be mentioned with regard to the second variant that the toothing between the crown wheels 65 and 75 controls the movement of both crown wheels each other regardless of the exact position of the closed position SS locks. So overall, it's a mechanic that can be triggered at any position. The maximum "error" that can occur (due to the size of the toothing) is negligible, since the front buffer 13 always ensures a release path of about 2 mm is available and therefore a sufficiently effective release path is available even with a maximum error. to trigger the drive device 1.

Away Figure 36 a third embodiment variant of the drive device 1 of the drive device 1 according to the invention is shown. In particular, they show Figure 36 and 37 again exploded views of the drive device 1, once from the front and once from behind. The basic structure of this third embodiment variant is again more similar to the first embodiment variant, since the triggering mechanism 6 and the delay device 9 are arranged in areas similar to those in the first embodiment variant and also act in a similar manner in terms of the entire movement sequence. In this variant, only one driver 11 is again necessary. For this reason, in this third embodiment variant, the structural unit referred to as the coupling mechanism in the second embodiment variant again assumes the function of the transmission device 7 and is composed primarily of the transmission element 70 and the catch lever 72, which are guided in the guide track 76. In this third embodiment variant, the basic mode of operation is again the same as in the first embodiment variant, which is why further details are not given here. The same also applies to the ejection device 4, which is composed of the control lever 45, the carriage base 44 and the ejection force accumulator 41. The carriage base 44 and the control lever 45 of the ejection carriage 40 are pivotally connected to one another via the pivot joint 48 .

In this third embodiment variant, the release mechanism 6 again has a release linkage 69 . The trip linkage 69 includes the first Linkage part 69a, the second linkage part 69b and the third linkage part 69c. The linkage part 69a simultaneously forms the release lever 61 in this embodiment variant. This latching tooth 64 corresponds to the latching depressions 74 formed on the transmission element 70 and forming the first coupling element 81 of the coupling device 8 . A spring retaining tab 698 is attached to the first linkage portion 69a. A leg of the leg spring 699 rests against this spring retaining projection 698 . A bearing recess 681 is formed on the end of the first linkage part 69a facing away from the second coupling element 82 . The bearing projection 682 formed at the upper end of the second linkage part 69b engages in this bearing recess 681 . The central coiled area of the torsion spring 699 surrounds the bearing projection 682. One leg of the torsion spring 699 bears against the pivot bearing 683 of the second linkage part 69b. This rotary bearing 683 is rotatably mounted in the depression 694 formed in the housing base plate 30 . The rotation of the second linkage portion 69b is limited by the rotation limit stop surface 684 formed in the housing base plate 30 . A bearing recess 685 is formed at the lower end of the second link 69b. The bearing projection 686 of the third linkage part 69c engages in this bearing recess 685 . The third linkage part 69c has the retaining bolt 696 at the other end. The third linkage part 69c and thus the entire release linkage 69 is connected to the retaining hole 601 formed in the release element 60 via this retaining bolt 696 .

The deceleration device 9 initiates a braked movement of the second coupling element 82 formed on the first linkage part 69a in the direction of the first coupling element 81 . This delay device 9 thus forms a timing element with which the movement of the coupling device 8 triggered by the engagement energy store 83 from the uncoupled position EK into the Coupling position KS is carried out with a time delay. In this third embodiment, the deceleration device 9 has a damped carriage 951 . This damping carriage 951 is supported in a limited linearly movable manner in the damping guideway 953 formed in the housing cover 31 via the guide projections 952 . The spring guide mandrel 954 engages in a head region of the damped carriage 951 . The compression spring 955 surrounding the engagement force accumulator 83 surrounds the spring guide pin 954. The spring guide pin 954 is held in the retaining clip 956 of the carrier 3. A rack section 957 is formed on the cushioned carriage 951 . The gear 961 corresponds to this rack section 957. Together with the two bearing elements 962 and 963 and the end caps 964 and 965, the gear 961 forms the rotation damper 966 of the deceleration device 9. This rotation damper 966 is held in the circular recesses 967 of the carrier 3. The rotary damper 966 acts via the rack and pinion pairing to brake the damped carriage 951 and, due to the geometry, dampens the upward movement triggered by the compression spring 955 (engagement energy store 83) more than the downward movement.

The mandrel holder 68b, in which the guide mandrel 68 is held, is formed in the release element 60. At the other end, the guide mandrel 68 is held on the carrier 3 in the mandrel holder 68a. The guide mandrel 68 is surrounded by the spring 67 designed as a compression spring. This spring 67 acts on the triggering element 60 in the direction pointing away from the ejection force accumulator 41 . A toothed rack 121 is also formed on the release element 60 . This rack 121 corresponds to the gear 122, which in turn is arranged on the synchronization rod 123, not shown here. Thus, this rack 121 and the gear wheel 122 form part of the synchronization device 12.

In 38 an initial position for explaining the sequence of movements of the drive device 1 according to the third embodiment variant is shown in a plan view. In this 38 the locking pin 50 is in the position area L of the guide track 51. The movable furniture part 2 is in an open position OS. The stop surface 73 of the transmission element 70 rests on the control lever 45 in the area of the contact element 451 .

In Figure 39 the movable furniture part 2 is still in an open position OS, the movable furniture part 2 having been moved in the closing direction SR by a user. As a result, the transmission element 70 is moved relative to the carrier 3 along the guide track 76 as a result of its contact with the driver 11 fixed to the furniture carcass. The stop surface 73 is still in contact with the control lever 45. The locking pin 50 moves through the tensioning section S of the guideway 51. During this movement, the ejection force accumulator 41 is tensioned.

In figure 40 the movable furniture part 2 is still in the open position OS. Due to the control lever path 452 formed in the transmission element 70, the control lever 45 was pivoted counterclockwise via the contact element 451. The locking pin 50 is located at the pre-locking point W of the guide track 51. The guide surface 958 of the cushioned carriage 951 rests on the contact surface 703 of the transmission element 70. FIG. Since these two surfaces are aligned obliquely to the movement of the transmission element 70 along the guide track 76, the damping carriage 951 is pushed away from the transmission element 70. The damping carriage 951 moves against the force of the engagement energy store 83 via its guide projections 952 along the damping guideway 953. Since the toothed rack section 957 meshes with the gear wheel 961 of the rotary damper 966, the rotary damper 966 is rotated clockwise. Also the second coupling element 82 forming Latching tooth 64 comes into contact with the contact surface 703 of the transmission element 70. As a result, the first linkage part 69a is pivoted clockwise about the bearing projection 682 of the second linkage part 69b. The rear part of the latching tooth 64 forming the second coupling element 82 abuts against a head region of the cushioned slide 951 .

In Figure 41 the movable furniture part 2 is still in an open position OS. The transfer carriage 70 was moved further in the closing direction RS by a drawing-in device not shown here. in the in Figure 41 In the illustrated position, the latching tooth 64 of the first linkage part 69a just passes the highest point of the contact surface 703 of the transfer carriage 70. Indirectly, the damped carriage 951 is also pressed further down via this latching tooth 64. In the process, the compression spring 955 surrounding the spring guide mandrel 954 is compressed even further. The rotary damper 966 is also rotated further in a clockwise direction.

In Figure 42 the movable furniture part 2 is just in an open position OS. The contact element 451 has already reached the beveled area of the control lever track 452 in the transmission element 70 . However, the locking pin 50 is still located at the preliminary locking point W. The latching tooth 64 forming the second coupling element 82 has already overcome the highest point of the contact surface 703 . As a result, this latching tooth 64 is no longer in contact with the contact surface 703 . The first linkage part 69a is therefore no longer pushed away from the transmission element 70, but is pressed against the damped carriage 951 by the torsion spring 699. The (stronger) spring 955 can relax and pushes the dampened carriage 951 along the dampening guideway 953 upwards. This movement is dampened by the rotary damper 966 of the deceleration device 9 . This also explains why the second coupling element 82 is still at a distance from the transmission element 70 .

By moving the movable furniture part 2 further in the closing direction, Figure 43 the locking pin 50 is released from the pre-locking point W and moves through the locking movement area E in the direction of the locking recess 52. The compression spring 955 (engagement energy store 83) has been able to relax even further. However, the latching tooth 64 forming the second coupling element 82 is still at a distance from the transmission element 70, in particular from the latching depressions 74 formed on the transmission element 70, which forms the first coupling element 81.

Next comes a position, not shown, in which the locking pin 50 is locked in the locking recess 52 . As a result, the locking device 5 is in the locking position VS. However, the two coupling elements 81 and 82 are still slightly spaced apart, which is why they are in the uncoupled position EK.

When the ejection device 4 is in the locking position VS, the coupling device 8 can then be moved from the uncoupled position EK into the coupled position KS. As a result, the position is according to Figure 44 achieved, with the latching tooth 64 of the second coupling element 82 contacting a corresponding depression of the latching depressions 74 of the first coupling element 81 . This means that the damped carriage 51 was finally moved upwards by the compression spring 955 (coupling energy accumulator 83) despite the deceleration by the rotary damper 966 until the coupling device 8 is in the coupling position KS. The movable furniture part 2 is in the closed position SS.

In Figure 45 the overpressure position ÜS of the movable furniture part 2 is reached by pressing in the closing direction SR on the furniture part 2 that is in the closed position SS. Since in the given coupling position KS the transmission device 7 is coupled for movement by the coupling device 8 with the release mechanism 6, is through the Pressing movement triggers the unlocking of the locking device 5 and the ejection device 4 can eject the movable furniture part 2 in the opening direction OR. In detail, this takes place in that the second coupling element 82 resting thereon is also moved via the first coupling element 81 . As a result, the trigger linkage 69 is also moved accordingly. The first linkage part 69a forming the release lever 61 is taken along by the transmission element 70, the second linkage part 69b being pivoted counterclockwise about the pivot bearing 683 via the bearing recess 681 of the first linkage part 69a and the bearing projection 682. At the same time, the third linkage part 69c is displaced via the bearing recess 685 and the bearing projection 686 . Since the third linkage part 69c acts on the retaining hole 601 of the triggering element 60 via the retaining bolt 696, the triggering element 60 is displaced in the recess 54 against the force of the spring 67. The locking element 53 is formed on the triggering element 60 . The displacement of the triggering element 60 unlocks the locking device 5 and, together with the ejection device 4, moves into the unlocking position ES according to FIG Figure 45 . As a result, the locking pin 50 is no longer locked on the locking element 53 that also forms the locking recess 52, as has already been described above. As a result, the ejection force accumulator 41 can develop its force and the drive device 1 reaches the position according to FIG Figure 46 . During this movement, the toothed rack 121 also meshes with the gear wheel 122, which causes the corresponding synchronization with an opposite drive device 1 via the synchronization rod 123.

In Figure 46 accordingly, an open position OS of the movable furniture part 2 is again shown, with the locking pin 50 being located in the ejection section A of the guide track 51 . Since this locking pin 50 is no longer in contact with the locking element 53, the spring 67 can relax again and move the triggering element 60 to the opposite lateral stop of the recess 54. With this movement of the Trigger element 60 is also the trigger linkage 69 moves back in the opposite direction. Specifically, the second link 69b pivots clockwise. During the ejection movement, the transmission element 70 is moved relative to the carrier 3 along the guide track 76 via the contact element 451 of the control lever 45 . There is therefore also a relative movement between the two coupling elements 82 and 81. Since the latching depressions 74 on the transmission element 70 have an inclined flank, the latching tooth 64 can slide out of the latching depressions 74 like a ratchet, as a result of which the coupling position KS is canceled again. In Figure 46 the latching tooth 64 again contacts the contact surface 703 of the transmission element 70, as a result of which the first linkage part 69a is pressed down again. This also moves the damped carriage 451 again. However, this movement only serves to move the latching tooth 64 past the highest point of the contact surface 703. Otherwise this movement has no effect.

In Figure 47 the movable furniture part 2 was moved even further in the opening direction OR. The ejection force accumulator 41 is completely relaxed. The cushioned carriage 451 has not yet moved all the way up due to the rotation damper 966 of the deceleration device 9 .

If the further opening movement and later the closing movement are then continued, the starting position according to FIG 38 reached, in which the locking pin 50 is arranged in the bearing area L of the guide track 51.

In the Figures 48 to 50 are again shown closed positions SS of the movable furniture part 2, but in each case the latching tooth 64 is latched in different indentations of the latching depressions 74. However, the coupling position KS is still given in each case, which is why overpressing in the closing direction SR corresponding to unlocking from the Locking position VS triggers. In these Figures 48 to 50 It can also be seen that the torsion spring 699 always attempts to rotate the first linkage part 69a clockwise relative to the second linkage part 69b via the spring retaining projection 698 and the pivot bearing 683 . This guarantees that the end of the latching tooth 64 facing away from the pointed end is always in contact with the damped carriage 951 .

In general, it should be pointed out that in all the exemplary embodiments and in all the mechanical connections there are always other possibilities for the transmission or coupling of movement. In particular, this applies to the various projections and depressions. These can namely always be formed exactly the other way around. It only has to be guaranteed in each case that the corresponding transmission of movement - for example between the linkage parts - is guaranteed. The specific configurations according to the three embodiment variants are therefore mainly used to provide examples that can really be reproduced by a person skilled in the art. However, only the basic functions are really important for the invention. In the case of the ejection device 4, it is therefore important that an ejection of the movable furniture part 2 from the closed position SS into an open position OS can be triggered. In the case of the locking device 5, it must be possible to lock the ejector device 4 (and, of course, to unlock it accordingly). The triggering mechanism 6 must be able to move the locking device 5 from the locking position VS into the unlocking position ES by overpressing. The transmission device 7 serves to transmit the position of the movable furniture part 2 to the triggering mechanism 6 mentioned. Finally, the coupling device 8 serves to couple the transmission device 7 to the triggering mechanism 6 so that it can move. However, this should be designed in such a way that only when the ejection device 4 is in the locked position VS Coupling device 8 is moved from the uncoupled position EK to the coupled position KS.

The first aspect of the present invention thus makes it possible that--regardless of the exact relative position of the locking pin 50 to the front side of the movable furniture part 2--triggering is guaranteed when overpressing, without the relative position having to be set using a depth adjustment wheel. The present invention achieves a tolerance range of approximately 5 mm. In particular, a gap in the movement transmission chain is closed by the invention, in that the coupling device 8 moves into the coupling position KS. However, this only takes place (preferably with a time delay or braked) when the movable furniture part 2 has actually reached the closed position SS, regardless of where exactly the locking pin 50 is located relative to the piece of furniture 100 .

The second aspect of the invention is on the one hand already in the first embodiment ( Figures 5 to 22 ) and in the third embodiment ( Figures 36 to 50 ) included, since the respective locking element 53 is mounted on the carrier 3 in a linearly movable manner. On the other hand, the second aspect of the invention is explained in more detail in the following (fourth) embodiment. This differs from the first and the third exemplary embodiment primarily in that the components of the triggering mechanism 6, the transmission device 7 and the coupling device 8 are missing, since they are irrelevant to the second aspect of the invention. Mixed forms are of course possible.

To the Figures 51 to 62 It should be pointed out that all of the components provided with reference numbers therein have the same properties as the components with the same reference numbers in the first and in the third exemplary embodiment in terms of their functioning. So if individual components are only briefly listed below or are only shown in figures, so the functionality as described in the said exemplary embodiments applies to each component.

Figure 51 shows a plan view of a drive device 1, with components lying in the background being illustrated by dashed lines. The position of the drive device 1 in the Figure 51 corresponds to the position Figure 44 . Accordingly, the movable furniture part 2 is in the closed position SS. The locking device 5, which is composed of the locking pin 50 and the locking element 53, is in the locking position VS. The locking element 53, together with the guideway 51 formed in the carrier 3, forms the detent recess 52 for the locking pin 50.

By overpressing the movable furniture part 2 in the closing direction SR, the drive device 1 reaches the overpressing position ÜS, which Figure 52 is shown. In addition, the Figure 52 the unlocking position ES of the locking device 5. The movement of the movable furniture part 2 in the closing direction SR (relative to the driver 11 to the right) releases the control lever 45 together with the locking pin 50 arranged thereon from the detent recess 52. The locking pin 50 thus comes into contact with the end face (corresponds to the slightly inclined surface 532) of the locking element 53. The unlocking bevel 511 and/or the pivoting movement of the control lever 45 can be used to move the locking pin 50 into this position.

Once starting from the Figure 52 the user no longer presses on the movable furniture part 2 - i.e. no longer over presses - the ejection force accumulator 41 can relax. As a result, the control lever 45 of the ejection device, together with the locking pin 50 arranged thereon, moves relative to the carrier 3 in the direction of the ejecting section Ader guideway 51 - ie opposite to the direction in which the locking pin 50 is located the overpressing movement moves. Since the locking pin 50 rests against the end face of the locking element 53, a linear movement of the locking element 50 is triggered. The locking element 53 is arranged on a base element 58, preferably formed in one piece with this (in the first and third exemplary embodiment, the release element 60 forms this base element 58). This base element 58 is mounted in or on the carrier 3 so that it can move to a limited extent. This base element 58 is particularly preferably guided in a recess 54 or on corresponding guide elements of the carrier 3 in a linearly movable manner. A force is applied to the locking element 53 (indirectly via the base element 58) by a force accumulator, preferably in the form of the spring 67. The locking element 53 can thus be moved in the direction of the ejection section A of the guideway 51 by the locking pin 50 counter to the force of the force accumulator. Out of Figure 53 it can be seen accordingly how the base element 58 has already moved away from the left-hand edge of the depression 54 . At the same time, the force accumulator (preferably guided on the guide mandrel 68) is compressed. A synchronizing element of the synchronizing device 12 is also formed on the base element 58 and is in movement-transmitting connection with the counter-synchronizing element of the synchronizing rod 123 . This synchronization element is preferably designed as a toothed rack 121 which meshes with the synchronization counter-element designed as a gear wheel 122 .

In Figure 54 a slight open position OS of the movable furniture part 2 has already been reached. The further movement of the locking element 53 by the locking pin 50 (still triggered by the ejection force accumulator 41) opens or releases a gap 57 between the locking element 53 and a limit stop 56 of the guideway 51. In Figure 54 the locking pin 50 has already moved to a good extent through the gap 57 in the direction of the ejection section A of the guide track 51 . This movement is made easier by a Locking element 53 formed surface 532, which is aligned obliquely to the linear direction of movement of the locking element 53 triggered. Thus, the locking pin 50 is deflected into the gap 57 by the surface 532 . In Figure 54 However, the locking pin 50 is still in contact with the locking element 53. The base element 58 rests on the right-hand edge of the recess 54. The force accumulator (spring 67) is further compressed. The synchronizing rod 123 has continued to rotate in accordance with the movement of the base member 58 .

Once the locking pin 50 has moved completely through the gap 57, the locking pin 50 disengages from the locking member 53 (and is thus disengaged from the surface 532). As a result, the base element 58 and the associated energy accumulator are no longer indirectly acted upon by the ejection energy accumulator 41 . The energy accumulator can relax and moves the base element together with the locking element 53 into the position according to FIG Figure 55 . Specifically, the locking element 53 is moved by the force accumulator in that direction in which the locking pin 50 moves during the overpressing movement. The locking element 53, together with the guide track 51, again forms the latching recess 52. The locking pin 50 has already moved through approximately half of the ejection section Ader the guide track 51.

The Figures 56 to 62 each show a plan view of an arrangement of a first drive device 1', a second drive device 1" and a synchronization device 12 synchronizing the two drive devices 1' and 1". The two drive devices 1' and 1" are mirror-symmetrical to one another.

In Figure 56 are the two drive devices 1 'and 1' each in the position according to Figure 51 . This means that both locking pins 50 are each located in the detent recess 52 and are in contact with the locking element 53 at the side.

In Figure 57 a user has pressed on one side of the movable furniture part 2 in the area of the first drive device 1'. As a result, only the locking pin 50 of the first drive device 1 ′ was unlocked and is in contact with the end face of the locking element 53 . This corresponds to the position Figure 52 . By contrast, the locking pin 50 of the second drive device 1" is still in the locking position VS due to the one-sided actuation.

In Figure 58 the user has released the movable furniture part 2 . As a result, the ejection force accumulator 41 of the first drive device 1' can relax. The locking pin 50 moves the locking element 53 over its end face, as a result of which the base element 58 is also moved against the force of the force accumulator (spring 67). The position of the first drive device 1' corresponds to that in Figure 53 shown position. The movement of the base element 58 and the synchronization element arranged on it (rack 122) results in a transmission of movement by means of the synchronization device 12. Specifically, the linear movement of the synchronization element (rack 122) of the first drive device 1' is converted into a rotary movement of the counter-synchronizing element (gear 121) of the Synchronizing rod 123 converted. This rotational movement of the synchronizing rod 123 is converted into a linear movement of the base element 58 of the second drive device 1" in the area of the second drive device 1" via the synchronizing counter-element on the rod side there and the synchronizing element there. As soon as the end face of the locking element 53 of the second drive device 1" is in line with the guideway 51 in the area of the detent recess 52, the locking pin 50 of the second drive device 1" can also move in the direction of the end face of the locking element 53 of the second drive device 1". , like this in Figure 58 is shown. The locking pin 50 slides, so to speak, along the inclined surfaces of the guide track 51 to the front side of the Locking element 53. Thus begins according to Figure 57 the overpressing movement is free from a transfer of movement between the first drive device 1' and the synchronization device 12. The synchronization device 12 can be moved by the first drive device 1' when the movable furniture part 2 moves in the opening direction OR. In other words, a movement transmission from the first drive device 1 'to the synchronization device 12 takes place only after unlocking.

Then the ejection force accumulator 41 of the two drive devices 1' and 1" (practically synchronously) can relax, whereby according to Figure 59 the two locking pins 50 are located in the area of the respective gap 57. This corresponds to the Figure 54 .

The positions according to figure 60 correspond to the Figure 55 .

In Figure 61 is shown when unlocking occurs simultaneously on both sides, ie when the movable furniture part is pressed in the middle. As a result, the two locking pins 50 rest against the end face of the locking element 53 .

In Figure 62 Finally, another situation is shown, if starting from the position according to figure 60 is pressed onto the movable furniture part 2 in the closing direction SR. The two locking pins 50 then each reach the overload channel 512 of the guide track 51.

All to the Figures 51 to 62 Components, functions and movements not explicitly described are the same as in the first three exemplary embodiments, insofar as this is technically possible. Examples of this are the driver 11, the movable furniture part 2, the angled end section 24, the design of the entire guide track 51, the function and training of the ejection device 4, the design of the carrier 3, the function and design of the coupling mechanism 20, etc.

Reference list:

1

drive device

1'

first drive device

1"

second drive device

2

moveable piece of furniture

3

carrier

4

ejection device

5

locking device

6

trigger mechanism

7

transmission device

8th

coupling device

9

damping device

10

furniture body

11

driver

12

synchronization device

121

rack

122

gear

123

sync bar

124

guideway

125

tension spring

13

front buffer

130

buffer sleeve

131

buffer force accumulator

132

pestle

14

front panel

15

drawer container

16

pull-out guide

17

cabinet rail

18

loading rail

19

mounting plate

20

coupling mechanism

21

coupling slide

22

coupling lever

23

coupling track

24

angled end section

26

coupling driver

25

reset device

251

retaining mandrel

252

Base

253

recess

254

compression spring

255

return sleeve

256

guideway

257

sleeve stop

258

accrual collection

30

housing base plate

31

housing cover

40

ejection slide

41

ejection force accumulator

42

first power storage base

43

second power storage base

44

sled base

45

control lever

451

contact element

452

joystick track

453

angled section

46

guideway

47

joystick axis

48

swivel joint

50

locking pin

51

Guide track for locking pin

511

unlocking bevel

512

overload channel

52

rest recess

53

locking element

531

locking surface

532

Surface

54

deepening

55

guide

56

limit stop

57

gap

58

base element

60

release element

601

holding hole

61

release lever

611

bearing element

62

compensating wedge

63

curved surface

64

snap tooth

65

crown wheel

651

bearing element

652

deepening

66

guide protrusions

67

Feather

68

guide mandrel

68a

Mandrel mount on carrier

68b

Mandrel mount on release element

681

bearing deepening

682

bearing projection

683

pivot bearing

684

rotation limit stop surface

685

bearing deepening

686

bearing projection

687

bearing projection

688

retaining bolt recess

69

trigger linkage

69a

first rod part

69b

second rod part

69c

third rod part

691

appendages

692

linear guideway

693

bearing element

694

deepening

695

Long hole

696

retaining bolts

697

Long hole

698

spring retaining tab

699

Leg spring

70

transmission element

701

ejection stop

702

deflection slope

703

contact surface

71

attack

72

catch lever

721

head Start

722

pivot bearing

73

stop surface

74

snap indentations

75

rotatable crown wheel (first coupling element)

751

transmission lever

76

guideway

77

angled end section

79

damper stop

81

first coupling element

82

second coupling element

83

Engaging energy store

90

compensating bracket

901

bearing element

902

recess

903

bearing deepening

904

bearing deepening

91

gear

911

bearing element

912

deepening

913

holding recess

92

tension washer

921

deepening

922

spring protrusion

923

spring protrusion

93

first cocking lever

931

head Start

932

head Start

94

second cocking lever

941

upper ledge

942

lower ledge

95

return spring

951

dampened sleigh

952

leadership tabs

953

damping track

954

spring guide mandrel

955

compression spring

956

retaining clip

957

rack section

958

guide surface

96

deepening

961

gear

962

bearing element

963

bearing element

964

end cap

965

end cap

966

rotary damper

967

circular recesses

97

indentation/recess

98

guide

99

yielding element

100

Furniture

ss

closed position

OS

open position

vs

locked position

IT

unlocked position

ÜS

override position

OR

opening direction

SR

closing direction

EK

uncoupled position

KS

coupled position

D

axis of rotation

S

clamping section

vv

pre-locking point

A

ejection section

L

storage area

E

snapping range of motion

Claims (15)

1. A drive device (1) for a movable furniture part (2), in particular for a drawer, comprising:

   - a carrier (3),

   - an ejection device (4) for ejecting the movable furniture part (2) from a closed position (SS) into an open position (OS), the ejection device (4) being movable relative to the carrier (3), wherein the ejection device (4) can be unlocked by an overpressing movement of the movable furniture part (2) from a locking position (VS) into an overpressing position (US) situated beyond the closed position (SS), and

   - a locking device (5) for locking the ejection device (4) in a locking position (VS), wherein the locking device (5) comprises a locking pin (50) arranged on the ejection device (4) and a guide track (51) - preferably at least partly formed in the carrier (3)

   - for the locking pin (50), wherein in the locking position (VS) the locking pin (50) is locked in a latch recess (52) of the guide track (51), wherein the latch recess (52) is at least partly formed by a locking element (53) which is movable relative to the carrier (3), wherein in the locking position (VS) the locking pin (50) is held on the locking element (53),
   wherein the locking element (53) is supported in a linearly movable manner on the carrier (3), wherein the locking element (53) is - starting from its position when being in the locking position (VS) - linearly movable contrary to that direction in which the locking pin (50) is moved during the overpressing movement, wherein

   - the ejection device (4) comprises an ejection slider (40) being movable relative to the carrier (3) and an ejection force storage member (41), preferably formed as a tension spring, wherein the ejection force storage member (41) is attached to the carrier (3) by means of a first force storage member base (42) and to the ejection slider (40) by means a second force storage member base (43), wherein the ejection slider (40) is linearly movable in an ejection track provided in the carrier (3) and wherein the ejection slider (40) comprises a slider base (44) and a control lever (45) being pivotably supported on the slider base (44), wherein the locking pin (50) of the locking device (5) is arranged on the control lever (45) of the ejection device,

   - wherein the locking element (53) is force-actuated by a force storage member, wherein by a movement of the movable furniture part (2) in closing direction (SR) the control lever (45) is released from the latch recess (52) along with the locking pin (50) arranged thereon, whereby the locking pin (50) abuts a surface (532) of the locking element (53), wherein for the movement of the locking pin (50) into this position an unlocking slant (511) and/or the swiveling movement of the control lever (45) is used, whereby the locking pin (50) abuts the locking element (53) after the unlocking and the locking element (53) is moveable by the locking pin (50) against the force of the force storage member in the direction of the ejection section (A) of the guide track (51).
2. The drive device according to claim 1, characterized in that the locking element (53) is connected with a synchronizing element for synchronizing the movement of the locking element with a locking element (53) of a second locking device (5).
3. The drive device according to claim 1 or 2, characterized in that the locking element (53) is movably supported in a limited manner and is guided linearly slidable on the carrier (3), preferably in a recess (54) of a housing base plate (30) of the carrier (3).
4. The drive device according to one of claims 1 to 3, characterized in that the locking element (53) - starting from its position when the locking position (VS) is given - is movable linearly in the direction of an ejection section (A) of the guide track (51).
5. The drive device according to one of claims 1 to 4, characterized in that the locking element (53) is force-actuated by a spring (67).
6. The drive device according to one of claims 1 to 5, characterized in that the locking element (53) - as soon as the locking pin (50) is disengaged from the locking element (53) - is movable by the force storage member in that direction in which the locking pin (50) is moved during the overpressing movement.
7. The drive device according to one of claims 1 to 6, characterized in that - by the movement of the locking element (53) initiated by the locking pin (50) - a gap (57) is released between the locking element (53) and a limit stop (56) of the guide track (51).
8. The drive device according to claim 7, characterized in that the locking pin (50) is movable through the gap (57) further into the ejection section (A) of the guide track (51) and the locking pin (50) is being disengaged from the locking element (53).
9. The drive device according to claim 7 or 8, characterized in that - by a surface (532) formed on the locking element (53), which surface (532) is oriented transverse to the linear movement direction of the locking element (53) - the locking pin (50) is deflected into the gap (57) and the locking pin (50) is released from said surface (532).
10. The drive device according to at least one of claims 1 to 9, characterized in that the locking device (5) comprises a locking pin (50) arranged on the ejection device (4), preferably on its control lever (45), and a guide track (51) - preferably at least partly formed in the carrier (3) - for the locking pin (50), wherein in the locking position (VS) the locking pin (50) is locked in a latch recess (52) of the guide track (51).
11. An arrangement comprising

    - a first drive device (1`) according to one of the claims 1 to 10,

    - a second drive device (1") according to one of the claims 1 to 10 and

    - a synchronizing device (12) for synchronizing the locking elements (53) of both drive devices (1', 1 ") .
12. The arrangement according to claim 11, characterized in that the overpressing movement begins free from a movement transmission between the first drive device (1') and the synchronizing device (12) and the synchronizing device (12) is movable upon a movement of the movable furniture part (2) in opening direction (OR) by the first drive device (1').
13. The arrangement according to claim 12, characterized in that a movement transmission from the first drive device (1') to the synchronizing device (12) is carried out only after the unlocking.
14. The arrangement according to one of claims 11 to 13, characterized in that the synchronizing device (12) comprises synchronizing elements - preferably formed as toothed racks (121) - each arranged on one of the drive devices (1', 1").
15. The arrangement according to one of the claims 11 to 14, characterized in that the synchronizing device (12) comprises a, preferably rotatable, synchronizing rod (123), wherein synchronizing elements, preferably toothed wheels (122), are arranged on both ends of the synchronizing rod (123).

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